The following figure is an uncomplicated example of a task flow for a login flow on a website. There are a couple of other elements such as register, reset password, and system notifications that should be included in a typical task flow. In this case they were omitted to demonstrate the basic flow and look of a task flow compared to a user journey:
Just remember that UX methodologies implemented are unique and owned by the individual who executes them as well as the project they serves.